[The experts are at odds with each other over some aspects of weight control. When the U.S. Department of Agriculture released their new food pyramid in April, many critics cheered that, at last, better guidance was being given to consumers on making healthy food choices. Yet even the new pyramid which makes more recommendations about quantities of food, exercise, and allows for individual differences—among other things—has also been criticized as insufficient.] It's clear that we need to rebuild the pyramid from the ground up, ... not just tip it on its side and dress it up with new colors.

Walter Willett